Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico

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Palaeomagnetic results for 178 oriented samples from five sections (combined thickness of 75 m) of the red bed Tecomazuchil Formation, southern Mexico are reported. The formation has been assigned to the Bathonian(?)-Callovian, and the sections studied cover its uppermost portion. Alternating field...

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Autores principales: Fucugauchi, J.U., Böhnel, H.N., Valencio, D.A.
Formato: JOUR
Materias:
Jurassic
magnetostratigraphy
palaeomagnetism
red bed
Mexico
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319201_v64_n2-4_p237_Fucugauchi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00319201_v64_n2-4_p237_Fucugauchi
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spelling todo:paper_00319201_v64_n2-4_p237_Fucugauchi2023-10-03T14:43:33Z Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico Fucugauchi, J.U. Böhnel, H.N. Valencio, D.A. Jurassic magnetostratigraphy palaeomagnetism red bed Mexico Palaeomagnetic results for 178 oriented samples from five sections (combined thickness of 75 m) of the red bed Tecomazuchil Formation, southern Mexico are reported. The formation has been assigned to the Bathonian(?)-Callovian, and the sections studied cover its uppermost portion. Alternating field (a.f.), thermal, combination of a.f. and thermal, and chemical demagnetizations were used to investigate the magnetic stability and vectorial directions of all samples. Most samples showed apparent stable behaviour with dominantly single or two-component magnetization. Reverse and intermediate polarity samples more often showed two- and multi-component remanences. Behaviour during demagnetization and rock-magnetic experiments indicate that the remanences reside in magnetite, haematite and goethite. The magnetostratigraphic results reveal a polarity pattern characterized by frequent polarity changes. © 1990. Fil:Valencio, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00319201_v64_n2-4_p237_Fucugauchi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Jurassic
magnetostratigraphy
palaeomagnetism
red bed
Mexico
spellingShingle Jurassic
magnetostratigraphy
palaeomagnetism
red bed
Mexico
Fucugauchi, J.U.
Böhnel, H.N.
Valencio, D.A.
Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico
topic_facet Jurassic
magnetostratigraphy
palaeomagnetism
red bed
Mexico
description Palaeomagnetic results for 178 oriented samples from five sections (combined thickness of 75 m) of the red bed Tecomazuchil Formation, southern Mexico are reported. The formation has been assigned to the Bathonian(?)-Callovian, and the sections studied cover its uppermost portion. Alternating field (a.f.), thermal, combination of a.f. and thermal, and chemical demagnetizations were used to investigate the magnetic stability and vectorial directions of all samples. Most samples showed apparent stable behaviour with dominantly single or two-component magnetization. Reverse and intermediate polarity samples more often showed two- and multi-component remanences. Behaviour during demagnetization and rock-magnetic experiments indicate that the remanences reside in magnetite, haematite and goethite. The magnetostratigraphic results reveal a polarity pattern characterized by frequent polarity changes. © 1990.
format JOUR
author Fucugauchi, J.U.
Böhnel, H.N.
Valencio, D.A.
author_facet Fucugauchi, J.U.
Böhnel, H.N.
Valencio, D.A.
author_sort Fucugauchi, J.U.
title Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico
title_short Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico
title_full Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico
title_fullStr Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico
title_full_unstemmed Magnetostratigraphy of a Middle Jurassic red bed sequence from southern Mexico
title_sort magnetostratigraphy of a middle jurassic red bed sequence from southern mexico
url http://hdl.handle.net/20.500.12110/paper_00319201_v64_n2-4_p237_Fucugauchi
work_keys_str_mv AT fucugauchiju magnetostratigraphyofamiddlejurassicredbedsequencefromsouthernmexico
AT bohnelhn magnetostratigraphyofamiddlejurassicredbedsequencefromsouthernmexico
AT valencioda magnetostratigraphyofamiddlejurassicredbedsequencefromsouthernmexico
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